It's just pure mechanics, allowing you to cycle air through this breathing loop.

We're all breathing air right now. Air is a mixture of oxygen and nitrogen, about 20 percent oxygen. About 80 percent nitrogen is in our lungs.

The EPA's website says breathing air containing ozone can reduce lung function and increase respiratory symptoms like asthma.

And I asked him, how long is it possible to go without breathing, like how long could I go without air?

My next pursuit was I wanted to see how long I could go without breathing, like how long I could survive with nothing, not even air.

Is he breathing?

Tom's not breathing.

Breathing was difficult.

It was like breathing.

Breathing has become difficult.

(c) Respiratory protection specify appropriate types of respiratory protection based on the hazard and potential for exposure, including air purifying respirators and the proper purifying element (cartridge or canister) or breathing apparatus and

It's as old as breathing.

And I think they re breathing.

You are now breathing manually.

The dilemma is that all particles, whether white or black, constitute a serious problem for human health. Every year, an estimated two million people worldwide die prematurely, owing to the effects of breathing polluted air.

So you are currently breathing formaldehyde.

He does not seem to be breathing.

You stop breathing, and then you're dead.

I swear by the runners breathing pantingly,

I swear by the runners breathing pantingly,

They were breathing those words with fractal lungs.

So that's the breathing loop in a nutshell.

BJ We had a big challenge with breathing.

He was underneath, not breathing for 45 minutes.

Then I actually started thinking about liquid breathing.

AK You want to say something about the breathing?

And grasshoppers have a different kind of breathing system.

I shot the horse because it had trouble breathing.

The most fundamental of these is called the breathing loop.

Out of 52 minutes you're only breathing for eight minutes.

This is in China. This girl needed a breathing apparatus.

I was holding his hand as he stopped breathing and it wasn't until he'd actually stopped breathing and he was dead that I finally acknowledged he wasn't invincible, he said.

He told her Joshua isn't breathing properly, come home right away.

It'll help my breathing. It'll do something for my pulse, maybe.

And, again, civil societies breathing down the neck of the establishment.

And this breathing apparatus now saved the life, and she's very welcome.

Actually, I had this taxi driver telling me, Listen, I am breathing freedom.

And, the other component on a breathing loop is the carbon dioxide absorbent canister.

Last thing, breathing. A problem a lot of us have, certainly, when you're swimming.

By oath of those that sprint, breathing heavily. (The horses used in Holy War.)

By oath of those that sprint, breathing heavily. (The horses used in Holy War.)

You heard my voice don't hide your ear at my breathing, at my cry.

You heard my voice don't hide your ear at my breathing, at my cry.

In both cases, whether you have power or not, sometimes the patient needs help breathing.

Every time I breathe in, I'm breathing in a million billion billion atoms of oxygen.